those who don't take a nap. it's just 15 minutes a day to unwind the inflammation and anxiety of every day life. >> i would love to be able to do that. it's hard, and there are other things you mentioned, the idea of investing in your friends, what did you mean by that? >> we know the happiest people in america interact face to face about six hours a day. also, who you hang out with has a huge impact on your health behaviors. they are as infectious as catching a cold or a flu. the blue zones were not on diets, the people were not in exercise programs, but they proactively, or were born into a group of people that supported the right habits. >> do people take care of each other, to either better, go to the doctor -- what is it about that interaction that is so preventive or helpful. >> we live in a zone that does not promise friends. loneliness, you have fewer than one friend that cares about you on a bad day, your life expectancy drops eight year. but you go places, and people are in live long social networks wh